title: Manufacture and prebiotic potential of oligosaccharides derived from industrial solid wastes.
abstract: The solid waste obtained in malting industries when dehulling barley grains, which was mainly made up of barley husks, spent grains and grain fragments, was subjected to a double hydrothermal processing under selected conditions. The liquor from the second stage (containing xylooligosaccharides, XOS) was refined by membrane and ion exchange processing (with or without a previous endoxylanase treatment to reduce the XOS molecular weight). Three XOS concentrates with different purity and/or molecular weight distribution were fermented in vitro with faecal inocula to assess their prebiotic potential. Succinate, lactate, formiate, acetate, propionate and butyrate were generated in fermentations, confirming the prebiotic potential of the various products assayed. The purity of XOS concentrates did not play a significant role in fermentation, whereas the sample with shorter average degree of polymerization presented a faster fermentation kinetics and led to the highest concentration of lactic acid.
authors.affiliation: Department of Chemical Engineering, Faculty of Science, University of Vigo (Campus Ourense), As Lagoas, 32004 Ourense, Spain.
authors.forename: Patricia
authors.initials: P
authors.lastname: Gullón
authors.forename: María Jesús
authors.initials: MJ
authors.lastname: González-Muñoz
authors.forename: Juan Carlos
authors.initials: JC
authors.lastname: Parajó
mesh_terms: D003470:Culture Media; D005285:Fermentation; D007220:Industrial Waste; D009844:Oligosaccharides; D056692:Prebiotics
chemical_list: D003470:Culture Media; D007220:Industrial Waste; D009844:Oligosaccharides; D056692:Prebiotics